<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<link rel="stylesheet" href="css/bootstrap.css" />
		<script src="js/jquery-3.2.1.min.js"></script>
		<script src="js/bootstrap.js"></script>
		<style>
			.inner{
				height: 50px;
				border: 2px solid plum;
			}
		</style>
	</head>
	<body>
		<div class="container">
			<div class="row">
				<div class="col-md-4 inner"></div>
				<div class="col-md-4 inner"></div>
				<div class="col-md-4 inner"></div>
				<div class="col-md-4 inner"></div>
				<div class="col-md-4 inner"></div>
				<div class="col-md-4 inner"></div>
			</div>
		</div>
	</body>
</html>